Waipawa Trunk Sewer Main Renewal
The project is currently in the open market under tender, council is also currently working with affected landowners to prepare for the access required and the pump station upgrade.
We expect to have awarded a contractor by June 2019 and aim to complete all works by December 2019.
Following approval of the option in December 2018, GHD Ltd proceeded to develop a concept design to;
Mitigate root intrusion & other factors that impact operational performance
Maintain Dry Weather Flow capacity
Improve Peak Wet Weather Flow capacity to provide conveyance for 1-in-2 year Storm (current), at 187 l/s.
Update - 20 December 2018
An option assessment was undertaken by GHD and CHBDC to better understand the upgrade options we had available for this pipeline.
From this option assessment, a workshop was held with Council and a preferred option identified.
Following a tender and evaluation process, Council has awarded the design component of this project to GHD, and will start the design and risk review component this month.
This will involve reviewing CCTV, scoping and confirming the best renewal technique for this project. This will be reliant on the structure of the pipe. Due to the location of the pipe, a fair amount of stakeholder communication will take place prior to any works starting.
Council plans to start physical works following a tender phase in May 2019 allowing for a 5 month construction window and aiming to complete works by November 2019.
Further updates will be provided as this project progresses.
This project involves the cleaning and relining of the 375mm trunk sewer main that runs from McGreevy Street to Guy Street, and then again from Shanly Street to Johnson Street in Waipawa. This work will proactively prevent further tree root intrusion, and addresses the infiltration of ground water into the waste water system.
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